JPH05286188A - Form conveyor for printer - Google Patents

Abstract

PURPOSE:To provide a form conveyor, in which the frequency of the generation of a jam based on the paste surface of a form can be reduced and the form can be peeled easily even when the form is stuck on a form guide, for a printer. CONSTITUTION:A large number of projecting sections 13 brought into point- contact with a form P are formed to the guide surface of a lower-side form guide 4 guiding the form P inserted into a printer body from a form insertion port to a printing section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet such as a label sheet or a tag sheet that is releasably attached to a backing sheet or a sheet such as an assembled slip formed by superposing a plurality of slip sheets. The present invention relates to a paper transport device for a printer that performs printing.

[0002]

2. Description of the Related Art Conventionally, a sheet conveying device of this kind of printer has a sheet guide for guiding a sheet inserted in a printer body from a sheet insertion port between a print head and a platen, and is arranged on the sheet guide. It is configured to convey the sheet between the print head and the platen by a sheet conveying unit such as a feed roller provided.

[0003]

However, in such a conventional sheet conveying device, when a sheet of paper attached to the mount is inserted into the printer body through the sheet insertion port, a part of the sheet is removed from the mount. If it is peeled off, or if the backing and the paper are misaligned and the glue is exposed to the outside, the glue surface formed on the back side of the paper will stick to the guide surface of the paper guide, causing a jam (paper There was a problem that the frequency of occurrence of (clogging) was high. This problem also occurs when the ribs or beads having a predetermined height and width are formed on the guide surface of the paper guide so as to reduce the contact resistance with the paper.

The present invention has been made in view of the above problems, and an object thereof is to reduce the frequency of occurrence of a jam related to the adhesive surface of a sheet, and even if the sheet sticks to the sheet guide, the sheet thereafter. It is an object of the present invention to provide a paper transporting device for a printer, which can easily perform jam processing such as removing work of paper.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a paper guide for guiding a paper between a platen and a print head disposed facing the platen,
In a paper carrying device of a printer having a paper carrying means for carrying the paper arranged on the paper guide, a large number of convex portions which make point contact with the paper are provided on the guide surface of the paper guide.

[0006]

According to the present invention, by providing the guide surface of the paper guide with a large number of convex portions that come into point contact with the paper, a part of the paper is peeled off from the paper when the paper with the paper mount is inserted into the main body of the printer. Even if the backing and the paper are misaligned, it is possible to prevent the glue surface of the paper from making surface contact with the guide surface of the paper guide and sticking it over the entire surface. However, the frequency of jams can be reduced. Further, even if the paper peeled from the mount is stuck to the convex portion of the paper guide, the strength is smaller than the case where the paper is stuck to the entire surface.
Therefore, the paper can be easily peeled off from the paper guide by tweezers or the like, and the jam processing thereafter becomes easy.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 and 2, 1 is a printer main body, 2 is a paper insertion opening formed in the front portion of the printer main body 1, and the paper P inserted into the printer main body 1 from the paper insertion opening 2 is The upper sheet guide 3 and the lower sheet guide 4 of the sheet conveying device provided in the printer body 1 are guided to the printing unit 8.

As shown in FIG. 2, three sets of feed rollers 5a, 5b, 6a, 6b, 7 as sheet conveying means are provided in the middle of the upper sheet guide 3 and the lower sheet guide 4.
a and 7b are arranged at a predetermined interval, and these feed rollers 5a, 5b, 6a, 6b, 7a and 7b are provided.
The paper P is conveyed to the printing unit 8.

The printing unit 8 comprises a platen 9 and a print head 10 arranged so as to face the platen 9, and the print head 10 is moved by a carrier (not shown) in the longitudinal direction of the platen 9 (with respect to the paper surface). Printing on the paper P while moving it in the vertical direction).

The paper P that has passed through the printing unit 8 is fed by rollers 11a and 11b disposed above the printing unit 8.
Thus, the paper is discharged from the paper discharge port 12 formed on the upper surface of the printer body 1 through these spaces.

As shown in FIG. 3, the upper paper guide 3 and the lower paper guide 4 are made of a metal plate material and are formed by curving the whole in an arcuate shape, and the guide surface formed on the upper surface of the lower paper guide 4. As shown in FIGS. 4 and 5, a large number of convex portions 13 are arranged in a staggered manner over the entire guide surface of the lower paper guide 4. These protrusions 13 are, for example, hemispherical, and as shown in FIG. 4, the mount BP of the paper P inserted into the printer body 1 from the paper insertion opening 2
It comes in point contact with the side. The height of the guide surface of the lower paper guide 4 is 1 to 2 higher than that of the convex portion 13.
A plurality of ribs 14a and 14b having a height of about mm are arranged in parallel with each other in the width direction of the lower paper guide 4 with a predetermined interval.

On the other hand, on the guide surface formed on the lower surface of the upper paper guide 3, a large number of convex portions 15 having substantially the same shape as the convex portion 13 provided on the guide surface of the lower paper guide 4 are provided on the upper paper guide. For example, they are arranged in a staggered manner over the entire guide surface 3.

Further, the upper paper guide 3 has a rotation fulcrum 16 on the inlet side, and when the upper cover 17 of the printer body 1 is opened as shown in FIG. It is rotatably provided.

In the present embodiment configured as described above, the paper P inserted into the printer body 1 from the paper insertion slot 2
Are feed rollers 5a, 5b, 6a, 6b, 7 disposed in the middle of the upper paper guide 3 and the lower paper guide 4.
It is conveyed to the printing unit 8 by passing between the upper paper guide 3 and the lower paper guide 4 by a and 7b. And the printing unit 8
The paper P that has passed through is discharged from the paper discharge port 12 formed on the upper surface of the printer body 1 by the feed rollers 11a and 11b arranged above the printing unit 8.

When the paper P is conveyed as described above, the back surface of the paper P, that is, the mount B, is provided on the guide surface of the lower paper guide 4.
Since a large number of convex portions 13 that are in point contact with the P side are provided, the paper P inserted into the printer body 1 from the paper insertion opening 2 is lifted from the guide surface of the lower paper guide plate 4 as shown in FIG. While being kept in this state, the support structure receives the entire sheet of paper P at the tips of the large number of convex portions 13 so that it is conveyed by the feed rollers.

Therefore, the printer body 1 is inserted from the paper insertion slot 2.
Even if a part of the paper P is peeled off from the mount BP when the paper P is inserted into the inside of the paper P or the bonding between the paper P and the mount BP is slightly misaligned, it is formed on the back surface of the paper P. Since the glue surface is less likely to come into surface contact with the lower paper guide 4 and the glue surface of the paper P only comes into light contact with the tip of the convex portion 13, the occurrence frequency of jam can be reduced.

Further, even if the glue surface of the paper P sticks to the lower paper guide 4, unlike the case where the glue surface of the paper P is entirely adhered by surface contact, the strength of sticking to the convex portion 13 is small, so the paper P is small. When the paper sticks on the side of the paper insertion opening 2 side, the paper P is attached by tweezers or the like inserted from the side of the paper insertion opening 2 side.
Can be easily peeled off from the lower paper guide 4. Further, when the paper P is stuck on the printing unit 8 side for the same reason, the upper cover 17 is opened and the space between the paper guides 3 and 4 is opened as shown in FIG. The paper P can be easily peeled off from the lower paper guide 4 by tweezers or the like inserted.

As a method of forming the convex portions 13 and 15 on the guide surfaces of the lower paper guide 4 and the upper paper guide 3, for example, plastic molding, press forming of a steel plate, or the like may be used. Fine paint is sprayed on the guide surfaces of the guide 4 and the upper paper guide 3.
3,15 may be formed.

The convex portions formed on the guide surface of the lower paper guide 4 are elliptical convex portions 17 as shown in FIGS. 7 and 8, and these convex portions 17 are the paper guides 3, 4. The guide surfaces may be alternately arranged in the vertical and horizontal directions.

[0021]

As described above, according to the present invention, a large number of convex portions that make point contact with the paper are provided on the guide surface of the paper guide that guides the paper between the print head and the platen. A paper transport device for a printer that can reduce the occurrence of jams associated with the adhesive surface by reducing the amount of paper sticking to the guide surface, and can easily peel off the paper even if it sticks to the paper guide. Can be provided.

[Brief description of drawings]

FIG. 1 is an external view of a printer to which a sheet conveying device according to an embodiment of the invention is applied.

FIG. 2 is a schematic configuration diagram of the printer shown in FIG.

FIG. 3 is a perspective view of a sheet conveying device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

5 is a perspective view of the lower guide plate shown in FIG. 4. FIG.

FIG. 6 is an explanatory diagram when a jam process of the printer according to the embodiment is performed.

FIG. 7 is a diagram showing another embodiment of the present invention.

8 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

1 ... Main body, 2 ... Paper insertion port, 3 ... Upper paper guide, 4 ...
Lower paper guide, 5a, 5b, 6a, 6b, 7a, 7b
... Feed roller, 8 ... Printing section, 9 ... Platen, 10 ...
Print heads, 11a, 11b ... Feed rollers, 12 ...
Paper discharge port, 13 ... Convex portion, 14a, 14b ... Rib, 15
… Convex part.

Claims (1)

[Claims] 1. A printer having a paper guide for guiding a paper between a platen and a print head arranged to face the platen, and a paper conveying means arranged for conveying the paper. In the paper transport device of
A sheet conveying device for a printer, wherein a plurality of convex portions that make point contact with the sheet are provided on a guide surface of the sheet guide.